You can also do the following in the Rebase Stream Preview window:
You cannot deliver or rebase from other views attached to the development stream until you complete the operation. However, you can check out, check in, and run most other Rational® ClearCase® commands.
In the expanded area, set Show integration activities to see the baseline integration activities. An integration activity records a change set for a deliver or rebase operation.
An attempt is made to do the merge automatically. However, you can perform the merge on each element manually. To handle such a need, select Merge elements graphically to turn off all automated merging. If you select this option, the merge operation prompts you for confirmation before proceeding with each change.
To continue the rebase operation, click OK. You can rebase to baselines other than recommended.